Working

bertos/cpu/arm/drv/timer_lpc2.c

@@ -0,0 +1,81 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Francesco Sacchi <batt@develer.com>
+ *
+ * \brief Low-level timer module for LPC2xxx (implementation).
+ *
+ * notest:arm
+ */
+#include "cfg/cfg_timer.h"
+#include <cfg/macros.h> // BV()
+#include <cfg/debug.h> // BV()
+
+#include <drv/vic_lpc2.h>
+#include <io/lpc23xx.h>
+#include "timer_lpc2.h"
+
+/** HW dependent timer initialization  */
+#if (CONFIG_TIMER == TIMER0_COMPARE0)
+	#define TIMER0_ID 4
+	void timer_hw_init(void)
+	{
+		/* Power on timer0 */
+		PCONP |= BV(1);
+
+		/* Set TIMER0 clk to CPU_FREQ */
+		PCLKSEL0 &= ~0x0C;
+		PCLKSEL0 |= 0x04;
+
+		/* reset prescaler counter */
+		T0PR = 0;
+
+		/* Set match register 0 */
+		T0MR0 = TIMER_HW_CNT;
+		/* IRQ and reset counter on compare match 0 */
+		T0MCR &= ~0x03;
+		T0MCR |= 0x03;
+		/* Reset timer0 counter and prescaler */
+		T0TCR = 0x02;
+
+		vic_setVector(TIMER0_ID, timer_handler);
+		vic_enable(TIMER0_ID);
+
+		/* Start timer0 */
+		T0TCR = 0x01;
+	}
+
+
+#else
+	#error Unimplemented value for CONFIG_TIMER
+#endif /* CONFIG_TIMER */
+